1 /* Handle shared libraries for GDB, the GNU Debugger.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2005
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include <sys/types.h>
28 #include "gdb_string.h"
33 #include "exceptions.h"
38 #include "gdb_regex.h"
43 #include "completer.h"
44 #include "filenames.h" /* for DOSish file names */
48 #include "readline/readline.h"
50 /* external data declarations */
52 /* FIXME: gdbarch needs to control this variable */
53 struct target_so_ops
*current_target_so_ops
;
55 /* local data declarations */
57 static struct so_list
*so_list_head
; /* List of known shared objects */
59 static int solib_cleanup_queued
= 0; /* make_run_cleanup called */
61 /* Local function prototypes */
63 static void do_clear_solib (void *);
65 /* If non-zero, this is a prefix that will be added to the front of the name
66 shared libraries with an absolute filename for loading. */
67 static char *solib_absolute_prefix
= NULL
;
69 /* If non-empty, this is a search path for loading non-absolute shared library
70 symbol files. This takes precedence over the environment variables PATH
71 and LD_LIBRARY_PATH. */
72 static char *solib_search_path
= NULL
;
78 solib_open -- Find a shared library file and open it.
82 int solib_open (char *in_patname, char **found_pathname);
86 Global variable SOLIB_ABSOLUTE_PREFIX is used as a prefix directory
87 to search for shared libraries if they have an absolute path.
89 Global variable SOLIB_SEARCH_PATH is used as a prefix directory
90 (or set of directories, as in LD_LIBRARY_PATH) to search for all
91 shared libraries if not found in SOLIB_ABSOLUTE_PREFIX.
94 * If there is a solib_absolute_prefix and path is absolute:
95 * Search for solib_absolute_prefix/path.
97 * Look for it literally (unmodified).
98 * Look in SOLIB_SEARCH_PATH.
99 * If available, use target defined search function.
100 * If solib_absolute_prefix is NOT set, perform the following two searches:
101 * Look in inferior's $PATH.
102 * Look in inferior's $LD_LIBRARY_PATH.
104 * The last check avoids doing this search when targetting remote
105 * machines since solib_absolute_prefix will almost always be set.
109 file handle for opened solib, or -1 for failure. */
112 solib_open (char *in_pathname
, char **found_pathname
)
115 char *temp_pathname
= NULL
;
116 char *p
= in_pathname
;
118 while (*p
&& !IS_DIR_SEPARATOR (*p
))
123 if (! IS_ABSOLUTE_PATH (in_pathname
) || solib_absolute_prefix
== NULL
)
124 temp_pathname
= in_pathname
;
127 int prefix_len
= strlen (solib_absolute_prefix
);
129 /* Remove trailing slashes from absolute prefix. */
130 while (prefix_len
> 0
131 && IS_DIR_SEPARATOR (solib_absolute_prefix
[prefix_len
- 1]))
134 /* Cat the prefixed pathname together. */
135 temp_pathname
= alloca (prefix_len
+ strlen (in_pathname
) + 1);
136 strncpy (temp_pathname
, solib_absolute_prefix
, prefix_len
);
137 temp_pathname
[prefix_len
] = '\0';
138 strcat (temp_pathname
, in_pathname
);
141 /* Now see if we can open it. */
142 found_file
= open (temp_pathname
, O_RDONLY
, 0);
145 /* If the search in solib_absolute_prefix failed, and the path name is
146 absolute at this point, make it relative. (openp will try and open the
147 file according to its absolute path otherwise, which is not what we want.)
148 Affects subsequent searches for this solib. */
149 if (found_file
< 0 && IS_ABSOLUTE_PATH (in_pathname
))
151 /* First, get rid of any drive letters etc. */
152 while (!IS_DIR_SEPARATOR (*in_pathname
))
155 /* Next, get rid of all leading dir separators. */
156 while (IS_DIR_SEPARATOR (*in_pathname
))
160 /* If not found, search the solib_search_path (if any). */
161 if (found_file
< 0 && solib_search_path
!= NULL
)
162 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
163 in_pathname
, O_RDONLY
, 0, &temp_pathname
);
165 /* If not found, next search the solib_search_path (if any) for the basename
166 only (ignoring the path). This is to allow reading solibs from a path
167 that differs from the opened path. */
168 if (found_file
< 0 && solib_search_path
!= NULL
)
169 found_file
= openp (solib_search_path
, OPF_TRY_CWD_FIRST
,
170 lbasename (in_pathname
), O_RDONLY
, 0,
173 /* If not found, try to use target supplied solib search method */
174 if (found_file
< 0 && TARGET_SO_FIND_AND_OPEN_SOLIB
!= NULL
)
175 found_file
= TARGET_SO_FIND_AND_OPEN_SOLIB
176 (in_pathname
, O_RDONLY
, &temp_pathname
);
178 /* If not found, next search the inferior's $PATH environment variable. */
179 if (found_file
< 0 && solib_absolute_prefix
== NULL
)
180 found_file
= openp (get_in_environ (inferior_environ
, "PATH"),
181 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
, 0,
184 /* If not found, next search the inferior's $LD_LIBRARY_PATH
185 environment variable. */
186 if (found_file
< 0 && solib_absolute_prefix
== NULL
)
187 found_file
= openp (get_in_environ (inferior_environ
, "LD_LIBRARY_PATH"),
188 OPF_TRY_CWD_FIRST
, in_pathname
, O_RDONLY
, 0,
191 /* Done. If not found, tough luck. Return found_file and
192 (optionally) found_pathname. */
193 if (found_pathname
!= NULL
&& temp_pathname
!= NULL
)
194 *found_pathname
= xstrdup (temp_pathname
);
203 solib_map_sections -- open bfd and build sections for shared lib
207 static int solib_map_sections (struct so_list *so)
211 Given a pointer to one of the shared objects in our list
212 of mapped objects, use the recorded name to open a bfd
213 descriptor for the object, build a section table, and then
214 relocate all the section addresses by the base address at
215 which the shared object was mapped.
219 In most (all?) cases the shared object file name recorded in the
220 dynamic linkage tables will be a fully qualified pathname. For
221 cases where it isn't, do we really mimic the systems search
222 mechanism correctly in the below code (particularly the tilde
227 solib_map_sections (void *arg
)
229 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errors bogon */
231 char *scratch_pathname
;
233 struct section_table
*p
;
234 struct cleanup
*old_chain
;
237 filename
= tilde_expand (so
->so_name
);
239 old_chain
= make_cleanup (xfree
, filename
);
240 scratch_chan
= solib_open (filename
, &scratch_pathname
);
242 if (scratch_chan
< 0)
244 perror_with_name (filename
);
247 /* Leave scratch_pathname allocated. abfd->name will point to it. */
248 abfd
= bfd_fdopenr (scratch_pathname
, gnutarget
, scratch_chan
);
251 close (scratch_chan
);
252 error ("Could not open `%s' as an executable file: %s",
253 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
256 /* Leave bfd open, core_xfer_memory and "info files" need it. */
258 bfd_set_cacheable (abfd
, 1);
260 /* copy full path name into so_name, so that later symbol_file_add
262 if (strlen (scratch_pathname
) >= SO_NAME_MAX_PATH_SIZE
)
263 error ("Full path name length of shared library exceeds SO_NAME_MAX_PATH_SIZE in so_list structure.");
264 strcpy (so
->so_name
, scratch_pathname
);
266 if (!bfd_check_format (abfd
, bfd_object
))
268 error ("\"%s\": not in executable format: %s.",
269 scratch_pathname
, bfd_errmsg (bfd_get_error ()));
271 if (build_section_table (abfd
, &so
->sections
, &so
->sections_end
))
273 error ("Can't find the file sections in `%s': %s",
274 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
277 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
279 /* Relocate the section binding addresses as recorded in the shared
280 object's file by the base address to which the object was actually
282 TARGET_SO_RELOCATE_SECTION_ADDRESSES (so
, p
);
283 if (strcmp (p
->the_bfd_section
->name
, ".text") == 0)
289 /* Free the file names, close the file now. */
290 do_cleanups (old_chain
);
297 free_so --- free a `struct so_list' object
301 void free_so (struct so_list *so)
305 Free the storage associated with the `struct so_list' object SO.
306 If we have opened a BFD for SO, close it.
308 The caller is responsible for removing SO from whatever list it is
309 a member of. If we have placed SO's sections in some target's
310 section table, the caller is responsible for removing them.
312 This function doesn't mess with objfiles at all. If there is an
313 objfile associated with SO that needs to be removed, the caller is
314 responsible for taking care of that. */
317 free_so (struct so_list
*so
)
319 char *bfd_filename
= 0;
322 xfree (so
->sections
);
326 bfd_filename
= bfd_get_filename (so
->abfd
);
327 if (! bfd_close (so
->abfd
))
328 warning ("cannot close \"%s\": %s",
329 bfd_filename
, bfd_errmsg (bfd_get_error ()));
333 xfree (bfd_filename
);
335 TARGET_SO_FREE_SO (so
);
341 /* Return address of first so_list entry in master shared object list. */
343 master_so_list (void)
349 /* A small stub to get us past the arg-passing pinhole of catch_errors. */
352 symbol_add_stub (void *arg
)
354 struct so_list
*so
= (struct so_list
*) arg
; /* catch_errs bogon */
355 struct section_addr_info
*sap
;
357 /* Have we already loaded this shared object? */
358 ALL_OBJFILES (so
->objfile
)
360 if (strcmp (so
->objfile
->name
, so
->so_name
) == 0)
364 sap
= build_section_addr_info_from_section_table (so
->sections
,
367 so
->objfile
= symbol_file_add (so
->so_name
, so
->from_tty
,
368 sap
, 0, OBJF_SHARED
);
369 free_section_addr_info (sap
);
374 /* Read in symbols for shared object SO. If FROM_TTY is non-zero, be
375 chatty about it. Return non-zero if any symbols were actually
379 solib_read_symbols (struct so_list
*so
, int from_tty
)
381 if (so
->symbols_loaded
)
384 printf_unfiltered ("Symbols already loaded for %s\n", so
->so_name
);
388 if (catch_errors (symbol_add_stub
, so
,
389 "Error while reading shared library symbols:\n",
393 printf_unfiltered ("Loaded symbols for %s\n", so
->so_name
);
394 so
->symbols_loaded
= 1;
404 update_solib_list --- synchronize GDB's shared object list with inferior's
408 void update_solib_list (int from_tty, struct target_ops *TARGET)
410 Extract the list of currently loaded shared objects from the
411 inferior, and compare it with the list of shared objects currently
412 in GDB's so_list_head list. Edit so_list_head to bring it in sync
413 with the inferior's new list.
415 If we notice that the inferior has unloaded some shared objects,
416 free any symbolic info GDB had read about those shared objects.
418 Don't load symbolic info for any new shared objects; just add them
419 to the list, and leave their symbols_loaded flag clear.
421 If FROM_TTY is non-null, feel free to print messages about what
424 If TARGET is non-null, add the sections of all new shared objects
425 to TARGET's section table. Note that this doesn't remove any
426 sections for shared objects that have been unloaded, and it
427 doesn't check to see if the new shared objects are already present in
428 the section table. But we only use this for core files and
429 processes we've just attached to, so that's okay. */
432 update_solib_list (int from_tty
, struct target_ops
*target
)
434 struct so_list
*inferior
= TARGET_SO_CURRENT_SOS ();
435 struct so_list
*gdb
, **gdb_link
;
437 /* If we are attaching to a running process for which we
438 have not opened a symbol file, we may be able to get its
441 symfile_objfile
== NULL
)
442 catch_errors (TARGET_SO_OPEN_SYMBOL_FILE_OBJECT
, &from_tty
,
443 "Error reading attached process's symbol file.\n",
446 /* Since this function might actually add some elements to the
447 so_list_head list, arrange for it to be cleaned up when
449 if (!solib_cleanup_queued
)
451 make_run_cleanup (do_clear_solib
, NULL
);
452 solib_cleanup_queued
= 1;
455 /* GDB and the inferior's dynamic linker each maintain their own
456 list of currently loaded shared objects; we want to bring the
457 former in sync with the latter. Scan both lists, seeing which
458 shared objects appear where. There are three cases:
460 - A shared object appears on both lists. This means that GDB
461 knows about it already, and it's still loaded in the inferior.
462 Nothing needs to happen.
464 - A shared object appears only on GDB's list. This means that
465 the inferior has unloaded it. We should remove the shared
466 object from GDB's tables.
468 - A shared object appears only on the inferior's list. This
469 means that it's just been loaded. We should add it to GDB's
472 So we walk GDB's list, checking each entry to see if it appears
473 in the inferior's list too. If it does, no action is needed, and
474 we remove it from the inferior's list. If it doesn't, the
475 inferior has unloaded it, and we remove it from GDB's list. By
476 the time we're done walking GDB's list, the inferior's list
477 contains only the new shared objects, which we then add. */
480 gdb_link
= &so_list_head
;
483 struct so_list
*i
= inferior
;
484 struct so_list
**i_link
= &inferior
;
486 /* Check to see whether the shared object *gdb also appears in
487 the inferior's current list. */
490 if (! strcmp (gdb
->so_original_name
, i
->so_original_name
))
497 /* If the shared object appears on the inferior's list too, then
498 it's still loaded, so we don't need to do anything. Delete
499 it from the inferior's list, and leave it on GDB's list. */
504 gdb_link
= &gdb
->next
;
508 /* If it's not on the inferior's list, remove it from GDB's tables. */
511 /* Notify any observer that the shared object has been
512 unloaded before we remove it from GDB's tables. */
513 observer_notify_solib_unloaded (gdb
);
515 *gdb_link
= gdb
->next
;
517 /* Unless the user loaded it explicitly, free SO's objfile. */
518 if (gdb
->objfile
&& ! (gdb
->objfile
->flags
& OBJF_USERLOADED
))
519 free_objfile (gdb
->objfile
);
521 /* Some targets' section tables might be referring to
522 sections from so->abfd; remove them. */
523 remove_target_sections (gdb
->abfd
);
530 /* Now the inferior's list contains only shared objects that don't
531 appear in GDB's list --- those that are newly loaded. Add them
532 to GDB's shared object list. */
537 /* Add the new shared objects to GDB's list. */
538 *gdb_link
= inferior
;
540 /* Fill in the rest of each of the `struct so_list' nodes. */
541 for (i
= inferior
; i
; i
= i
->next
)
543 i
->from_tty
= from_tty
;
545 /* Fill in the rest of the `struct so_list' node. */
546 catch_errors (solib_map_sections
, i
,
547 "Error while mapping shared library sections:\n",
550 /* If requested, add the shared object's sections to the TARGET's
551 section table. Do this immediately after mapping the object so
552 that later nodes in the list can query this object, as is needed
556 int count
= (i
->sections_end
- i
->sections
);
559 int space
= target_resize_to_sections (target
, count
);
560 memcpy (target
->to_sections
+ space
,
562 count
* sizeof (i
->sections
[0]));
566 /* Notify any observer that the shared object has been
567 loaded now that we've added it to GDB's tables. */
568 observer_notify_solib_loaded (i
);
576 solib_add -- read in symbol info for newly added shared libraries
580 void solib_add (char *pattern, int from_tty, struct target_ops
581 *TARGET, int readsyms)
585 Read in symbolic information for any shared objects whose names
586 match PATTERN. (If we've already read a shared object's symbol
587 info, leave it alone.) If PATTERN is zero, read them all.
589 If READSYMS is 0, defer reading symbolic information until later
590 but still do any needed low level processing.
592 FROM_TTY and TARGET are as described for update_solib_list, above. */
595 solib_add (char *pattern
, int from_tty
, struct target_ops
*target
, int readsyms
)
601 char *re_err
= re_comp (pattern
);
604 error ("Invalid regexp: %s", re_err
);
607 update_solib_list (from_tty
, target
);
609 /* Walk the list of currently loaded shared libraries, and read
610 symbols for any that match the pattern --- or any whose symbols
611 aren't already loaded, if no pattern was given. */
614 int loaded_any_symbols
= 0;
616 for (gdb
= so_list_head
; gdb
; gdb
= gdb
->next
)
617 if (! pattern
|| re_exec (gdb
->so_name
))
620 if (readsyms
&& solib_read_symbols (gdb
, from_tty
))
621 loaded_any_symbols
= 1;
624 if (from_tty
&& pattern
&& ! any_matches
)
626 ("No loaded shared libraries match the pattern `%s'.\n", pattern
);
628 if (loaded_any_symbols
)
630 /* Getting new symbols may change our opinion about what is
632 reinit_frame_cache ();
634 TARGET_SO_SPECIAL_SYMBOL_HANDLING ();
644 info_sharedlibrary_command -- code for "info sharedlibrary"
648 static void info_sharedlibrary_command ()
652 Walk through the shared library list and print information
653 about each attached library.
657 info_sharedlibrary_command (char *ignore
, int from_tty
)
659 struct so_list
*so
= NULL
; /* link map state variable */
663 if (TARGET_PTR_BIT
== 32)
665 else if (TARGET_PTR_BIT
== 64)
669 internal_error (__FILE__
, __LINE__
,
670 "TARGET_PTR_BIT returned unknown size %d",
674 update_solib_list (from_tty
, 0);
676 for (so
= so_list_head
; so
; so
= so
->next
)
682 printf_unfiltered ("%-*s%-*s%-12s%s\n", addr_width
, "From",
683 addr_width
, "To", "Syms Read",
684 "Shared Object Library");
688 printf_unfiltered ("%-*s", addr_width
,
689 so
->textsection
!= NULL
690 ? hex_string_custom (
691 (LONGEST
) so
->textsection
->addr
,
694 printf_unfiltered ("%-*s", addr_width
,
695 so
->textsection
!= NULL
696 ? hex_string_custom (
697 (LONGEST
) so
->textsection
->endaddr
,
700 printf_unfiltered ("%-12s", so
->symbols_loaded
? "Yes" : "No");
701 printf_unfiltered ("%s\n", so
->so_name
);
704 if (so_list_head
== NULL
)
706 printf_unfiltered ("No shared libraries loaded at this time.\n");
714 solib_address -- check to see if an address is in a shared lib
718 char * solib_address (CORE_ADDR address)
722 Provides a hook for other gdb routines to discover whether or
723 not a particular address is within the mapped address space of
726 For example, this routine is called at one point to disable
727 breakpoints which are in shared libraries that are not currently
732 solib_address (CORE_ADDR address
)
734 struct so_list
*so
= 0; /* link map state variable */
736 for (so
= so_list_head
; so
; so
= so
->next
)
738 struct section_table
*p
;
740 for (p
= so
->sections
; p
< so
->sections_end
; p
++)
742 if (p
->addr
<= address
&& address
< p
->endaddr
)
743 return (so
->so_name
);
750 /* Called by free_all_symtabs */
755 /* This function is expected to handle ELF shared libraries. It is
756 also used on Solaris, which can run either ELF or a.out binaries
757 (for compatibility with SunOS 4), both of which can use shared
758 libraries. So we don't know whether we have an ELF executable or
759 an a.out executable until the user chooses an executable file.
761 ELF shared libraries don't get mapped into the address space
762 until after the program starts, so we'd better not try to insert
763 breakpoints in them immediately. We have to wait until the
764 dynamic linker has loaded them; we'll hit a bp_shlib_event
765 breakpoint (look for calls to create_solib_event_breakpoint) when
768 SunOS shared libraries seem to be different --- they're present
769 as soon as the process begins execution, so there's no need to
770 put off inserting breakpoints. There's also nowhere to put a
771 bp_shlib_event breakpoint, so if we put it off, we'll never get
774 So: disable breakpoints only if we're using ELF shared libs. */
776 && bfd_get_flavour (exec_bfd
) != bfd_target_aout_flavour
)
777 disable_breakpoints_in_shlibs (1);
781 struct so_list
*so
= so_list_head
;
782 so_list_head
= so
->next
;
784 remove_target_sections (so
->abfd
);
788 TARGET_SO_CLEAR_SOLIB ();
792 do_clear_solib (void *dummy
)
794 solib_cleanup_queued
= 0;
800 solib_create_inferior_hook -- shared library startup support
804 void solib_create_inferior_hook ()
808 When gdb starts up the inferior, it nurses it along (through the
809 shell) until it is ready to execute it's first instruction. At this
810 point, this function gets called via expansion of the macro
811 SOLIB_CREATE_INFERIOR_HOOK. */
814 solib_create_inferior_hook (void)
816 TARGET_SO_SOLIB_CREATE_INFERIOR_HOOK ();
821 in_solib_dynsym_resolve_code -- check to see if an address is in
822 dynamic loader's dynamic symbol
827 int in_solib_dynsym_resolve_code (CORE_ADDR pc)
831 Determine if PC is in the dynamic linker's symbol resolution
832 code. Return 1 if so, 0 otherwise.
836 in_solib_dynsym_resolve_code (CORE_ADDR pc
)
838 return TARGET_SO_IN_DYNSYM_RESOLVE_CODE (pc
);
845 sharedlibrary_command -- handle command to explicitly add library
849 static void sharedlibrary_command (char *args, int from_tty)
856 sharedlibrary_command (char *args
, int from_tty
)
859 solib_add (args
, from_tty
, (struct target_ops
*) 0, 1);
864 no_shared_libraries -- handle command to explicitly discard symbols
865 from shared libraries.
869 Implements the command "nosharedlibrary", which discards symbols
870 that have been auto-loaded from shared libraries. Symbols from
871 shared libraries that were added by explicit request of the user
872 are not discarded. Also called from remote.c. */
875 no_shared_libraries (char *ignored
, int from_tty
)
877 objfile_purge_solibs ();
878 do_clear_solib (NULL
);
882 reload_shared_libraries (char *ignored
, int from_tty
)
884 no_shared_libraries (NULL
, from_tty
);
885 solib_add (NULL
, from_tty
, NULL
, auto_solib_add
);
888 extern initialize_file_ftype _initialize_solib
; /* -Wmissing-prototypes */
891 _initialize_solib (void)
893 struct cmd_list_element
*c
;
895 add_com ("sharedlibrary", class_files
, sharedlibrary_command
,
896 "Load shared object library symbols for files matching REGEXP.");
897 add_info ("sharedlibrary", info_sharedlibrary_command
,
898 "Status of loaded shared object libraries.");
899 add_com ("nosharedlibrary", class_files
, no_shared_libraries
,
900 "Unload all shared object library symbols.");
902 deprecated_add_show_from_set
903 (add_set_cmd ("auto-solib-add", class_support
, var_boolean
,
904 (char *) &auto_solib_add
,
905 "Set autoloading of shared library symbols.\n\
906 If \"on\", symbols from all shared object libraries will be loaded\n\
907 automatically when the inferior begins execution, when the dynamic linker\n\
908 informs gdb that a new library has been loaded, or when attaching to the\n\
909 inferior. Otherwise, symbols must be loaded manually, using `sharedlibrary'.",
913 c
= add_set_cmd ("solib-absolute-prefix", class_support
, var_filename
,
914 (char *) &solib_absolute_prefix
,
915 "Set prefix for loading absolute shared library symbol files.\n\
916 For other (relative) files, you can add values using `set solib-search-path'.",
918 deprecated_add_show_from_set (c
, &showlist
);
919 set_cmd_cfunc (c
, reload_shared_libraries
);
920 set_cmd_completer (c
, filename_completer
);
922 /* Set the default value of "solib-absolute-prefix" from the sysroot, if
924 solib_absolute_prefix
= xstrdup (gdb_sysroot
);
926 c
= add_set_cmd ("solib-search-path", class_support
, var_string
,
927 (char *) &solib_search_path
,
928 "Set the search path for loading non-absolute shared library symbol files.\n\
929 This takes precedence over the environment variables PATH and LD_LIBRARY_PATH.",
931 deprecated_add_show_from_set (c
, &showlist
);
932 set_cmd_cfunc (c
, reload_shared_libraries
);
933 set_cmd_completer (c
, filename_completer
);